[Nouveau] [Bug 71994] New: Can't set performance level on Fermi card, Linux 3.13

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=71994

          Priority: medium
            Bug ID: 71994
          Assignee: nouveau at lists.freedesktop.org
           Summary: Can't set performance level on Fermi card, Linux 3.13
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: anakin.cs at gmail.com
          Hardware: Other
            Status: NEW
           Version: 9.2
         Component: Drivers/DRI/nouveau
           Product: Mesa

Created attachment 89753
  --> https://bugs.freedesktop.org/attachment.cgi?id=89753&action=edit
kernel log

I guess reclocking is supposed to work with Linux 3.13 with Fermi cards (I have
a GT 540M), but it doesn't seem to on mine:

# cat /sys/class/drm/card0/device/pstate 
03: core 50 MHz memory 135 MHz
07: core 202 MHz memory 324 MHz
0f: core 672 MHz memory 800 MHz
--: core 0 MHz memory 0 MHz *

# echo "0f" > /sys/class/drm/card0/device/pstate 
bash: echo: erreur d'écriture : Fonction non implantée

It means in English:
bash: echo: write error : Function not implemented

Am I doing anything wrong ?

I'm on ArchLinux.
linux-mainline 3.13rc1-1
nouveau-dri 9.2.3-2

Best regards,

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